Senior Full-Stack Developer (Python, Typescript, PostgreSQL) - PT/FT - NA/LATAM/EU

Client has an in-house-built operational platform (Postgres, Python, TypeScript, hosted on AWS) currently used to manage installer photo uploads, campaign tracking, vehicle/kit availability, and fleet data at scale (millions of data points, multiple large customers). It works but was built by a non-professional team under time pressure. Need someone to take over the existing codebase - not rebuild - and get it production-ready fast.

Responsibilities

• Build API integration capability (none exists yet - enterprise customers will need to connect their own systems; exact specs not yet defined by those customers)
• Build out scheduling module (currently managed in Excel - master sheet per campaign/location/target) and unify it with existing data platform as single source of truth
• Improve UI/UX - functional but rough; needs to look credible to enterprise customers
• Build a customer-facing view (permissioned, shows only approved/completed data - separate from internal working view)
• Work within and extend the existing architecture - must preserve prior work, not rearchitect from scratch
• NDA required before being shown proprietary/customer data (signed after first-stage interview, before technical deep-dive)

• Strong full-stack experience: Python, TypeScript
• PostgreSQL / relational DB fluency, comfortable with large-scale data (millions of rows, high update frequency)
• API design and third-party integration experience
• AWS hosting familiarity
• Strong English communication (spoken)
• Comfortable maintaining/extending an existing codebase rather than rebuilding, * Logistics/fleet ops platform experience
• Experience with Mac-based teams/back-end compatibility (client team is Mac-based)
• Eastern/Canada time zone overlap (preferred)